Effect of Fracture Criteria on Taylor Impact Fracture
Wei Zhang, Gang Wei, Xin-Ke Xiao, Zi-Tao Guo
Hypervelocity Impact Research Center, Harbin Institute of Technology,Harbin 150080, China
Abstract:
Taylor impact test on aluminum alloy 7A04-T6 presented in a previous study has been numerically evaluated using the finite element code ABAQUS/Explicit in this paper. The influence of fracture criterion in numerical simulations of the deformation and fracture behavior of Taylor rod has been studied. The following fracture criterions, included a modified version of Johnson-Cook, the Cockcroft-Latham(C-L), the constant fracture strain, the maximum shear stress and the maximum principle stress fracture models, have been used in this paper. Model constants for each criterion are calibrated from material tests. The modified version of Johnson-Cook fracture criterion with the stress triaxiality cut-off idea used can give good prediction to the Taylor impact fracture behavior. However, the C-L fracture criterion with only a constant required for calibrating by a simple test is found to give reasonable predictions. Unfortunately, the other three criteria are not able to repeat the experimentally obtained fracture behavior. The result indicates that the stress triaxiality cut-off idea is necessary to predict the Taylor impact fracture.
Key words: Taylor impact fracture fragmentation fracture criterion
DOI：10.11916/j.issn.1005-9113.2013.01.012
Clc Number:O346.1, O385
Fund:
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Effect of Fracture Criteria on Taylor Impact Fracture
本站小编 哈尔滨工业大学/2019-10-24
相关话题/Effect Fracture Criteria Taylor Impact
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